69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
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/*
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============================================================================
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Name : hev-rbtree.h
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Authors : Andrea Arcangeli <andrea@suse.de>
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David Woodhouse <dwmw2@infradead.org>
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Michel Lespinasse <walken@google.com>
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Heiher <r@hev.cc>
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Copyright : Copyright (c) 2018 everyone.
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Description : RedBlack Tree
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============================================================================
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*/
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#ifndef __HEV_RBTREE_H__
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#define __HEV_RBTREE_H__
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#include <stddef.h>
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typedef struct _HevRBTree HevRBTree;
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typedef struct _HevRBTreeNode HevRBTreeNode;
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struct _HevRBTree
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{
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HevRBTreeNode *root;
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};
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struct _HevRBTreeNode
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{
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unsigned long __parent_color;
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HevRBTreeNode *right;
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HevRBTreeNode *left;
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} __attribute__ ((aligned (sizeof (long))));
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static inline int
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hev_rbtree_node_empty (HevRBTreeNode *node)
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{
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return node->__parent_color == (unsigned long)node;
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}
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static inline HevRBTreeNode *
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hev_rbtree_node_parent (HevRBTreeNode *node)
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{
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return (HevRBTreeNode *)(node->__parent_color & ~3);
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}
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static inline void
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hev_rbtree_node_link (HevRBTreeNode *node, HevRBTreeNode *parent,
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HevRBTreeNode **link)
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{
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node->__parent_color = (unsigned long)parent;
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node->left = node->right = NULL;
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*link = node;
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}
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HevRBTreeNode *hev_rbtree_node_prev (HevRBTreeNode *node);
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HevRBTreeNode *hev_rbtree_node_next (HevRBTreeNode *node);
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HevRBTreeNode *hev_rbtree_first (HevRBTree *self);
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HevRBTreeNode *hev_rbtree_last (HevRBTree *self);
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void hev_rbtree_insert_color (HevRBTree *self, HevRBTreeNode *node);
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void hev_rbtree_replace (HevRBTree *self, HevRBTreeNode *victim,
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HevRBTreeNode *new);
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void hev_rbtree_erase (HevRBTree *self, HevRBTreeNode *node);
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#endif /* __HEV_RBTREE_H__ */
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